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-rw-r--r--perf/micro/sierpinski.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/perf/micro/sierpinski.c b/perf/micro/sierpinski.c
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+++ b/perf/micro/sierpinski.c
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+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-perf.h"
+
+static const double m_1_sqrt_3 = 0.577359269;
+
+static void
+T (cairo_t *cr, int size)
+{
+ cairo_move_to (cr, 0, 0);
+ cairo_line_to (cr, size, 0);
+ cairo_line_to (cr, size/2, size*m_1_sqrt_3);
+
+ size /= 2;
+ if (size >= 4) {
+ T (cr, size);
+ cairo_save (cr); {
+ cairo_translate (cr, size, 0);
+ T (cr, size);
+ } cairo_restore (cr);
+ cairo_save (cr); {
+ cairo_translate (cr, size/2, size*m_1_sqrt_3);
+ T (cr, size);
+ } cairo_restore (cr);
+ }
+}
+
+static cairo_time_t
+draw (cairo_t *cr, int width, int height, int loops)
+{
+ int t_height = height/2;
+ int t_width = t_height / m_1_sqrt_3;
+
+ cairo_set_source_rgb (cr, 1, 1, 1);
+ cairo_paint (cr);
+
+ cairo_set_source_rgb (cr, 0, 0, 0);
+ cairo_set_line_width (cr, 1.);
+
+ cairo_perf_timer_start ();
+
+ while (loops--) {
+ cairo_save (cr);
+ T (cr, t_width);
+
+ cairo_translate (cr, 0, height);
+ cairo_scale (cr, 1, -1);
+
+ T (cr, t_width);
+
+ cairo_stroke (cr);
+ cairo_restore (cr);
+ }
+
+ cairo_perf_timer_stop ();
+
+ return cairo_perf_timer_elapsed ();
+}
+
+cairo_bool_t
+sierpinski_enabled (cairo_perf_t *perf)
+{
+ return cairo_perf_can_run (perf, "sierpinski", NULL);
+}
+
+void
+sierpinski (cairo_perf_t *perf, cairo_t *cr, int width, int height)
+{
+ cairo_perf_run (perf, "sierpinski", draw, NULL);
+}